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Thermospheric meridional wind control of equatorial spread F and evening prereversal electric field

机译:赤道扩散F和傍晚反转电场的热圈子午风控制

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摘要

The role of the evening prereversal zonal electric field enhancement (PRE) as conducive to equatorial spread F (ESF)/plasma bubble development versus that of the magnetic meridional wind as a suppressing factor is examined using digital ionosonde data from an equatorial site, Sao Luis (SL), and a low latitude site, Cachoeira Paulista (CP) in Brazil. The evening vertical plasma drift (Vz) over SL is used, together with the F layer peak height (hmF2) over CP, to compute the magnetic meridional wind. The analysis performed for two epochs, that is, March-April of 1999 and 2001, provide consistent evidence that the magnetic meridional wind can negatively influence the ESF development in two ways: (a) by reduced development of the PRE and. (b) by direct suppression of the bubble growth.
机译:利用来自赤道站点圣路易斯的数字离子探空仪数据,研究了晚上逆转纬向电场增强(PRE)有助于赤道扩散F(ESF)/等离子气泡发展,而对子午线磁经风的抑制作用(SL)和低纬度地区巴西的Cachoeira Paulista(CP)。 SL上的傍晚垂直等离子漂移(Vz)与CP上的F层峰高(hmF2)一起用于计算子午风。对两个时期(即1999年3月至4月)进行的分析提供了一致的证据,表明子午磁风可以通过两种方式对ESF的发展产生负面影响:(a)通过减少PRE的发展和。 (b)通过直接抑制泡沫的增长。

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